"use client";

import { usePoll } from "@/lib/use-poll";
import type { EmailStats } from "@/lib/types";
import { StatCard } from "@/components/stat-card";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import { Badge } from "@/components/ui/badge";
import { StatusBadge } from "@/components/status-badge";

interface BackupResult {
  host: string;
  status: string;
  last_run: string;
  size?: string;
}

interface DriftResult {
  stack: string;
  drifted: boolean;
  details?: string;
}

interface StackRestart {
  stack: string;
  status: string;
  timestamp: string;
}

const categoryColors: Record<string, string> = {
  newsletters: "bg-blue-500/15 border-blue-500/25 text-blue-300",
  promotions: "bg-amber-500/15 border-amber-500/25 text-amber-300",
  social: "bg-purple-500/15 border-purple-500/25 text-purple-300",
  finance: "bg-green-500/15 border-green-500/25 text-green-300",
  receipts: "bg-emerald-500/15 border-emerald-500/25 text-emerald-300",
  travel: "bg-cyan-500/15 border-cyan-500/25 text-cyan-300",
  orders: "bg-orange-500/15 border-orange-500/25 text-orange-300",
  personal: "bg-pink-500/15 border-pink-500/25 text-pink-300",
  work: "bg-indigo-500/15 border-indigo-500/25 text-indigo-300",
  updates: "bg-teal-500/15 border-teal-500/25 text-teal-300",
  spam: "bg-red-500/15 border-red-500/25 text-red-300",
};

function getCategoryClass(cat: string): string {
  const lower = cat.toLowerCase();
  for (const [key, cls] of Object.entries(categoryColors)) {
    if (lower.includes(key)) return cls;
  }
  return "bg-white/[0.06] border-white/[0.08] text-muted-foreground";
}

export default function AutomationsPage() {
  const { data: emails } = usePoll<EmailStats>("/api/automations/email", 60000);
  const { data: backups } = usePoll<Record<string, unknown>>("/api/automations/backup", 120000);
  const { data: drift } = usePoll<Record<string, unknown>>("/api/automations/drift", 120000);
  const { data: restartsData } = usePoll<{ entries: StackRestart[] }>("/api/automations/restarts", 60000);
  const restarts = restartsData?.entries ?? [];

  // Compute stats for top row
  const totalEmailsToday = emails?.accounts
    ? emails.accounts.reduce((sum, acct) => {
        const today = Number((acct as Record<string, unknown>).today ?? (acct as Record<string, unknown>).today_total ?? 0);
        return sum + today;
      }, 0)
    : 0;

  const backupOk = String(backups?.status ?? "unknown") === "ok";
  const driftStatus = String(drift?.status ?? "unknown");
  const driftClean = driftStatus === "clean" || driftStatus === "no_log";
  const restartCount = restarts.length;

  return (
    <div className="space-y-8">
      <h1 className="text-lg font-semibold">Automations</h1>

      {/* Top: Big stats row */}
      <div className="grid grid-cols-2 md:grid-cols-4 gap-4">
        <StatCard
          label="Emails Today"
          value={emails ? totalEmailsToday : "\u2014"}
          color="blue"
          sub="classified"
        />
        <StatCard
          label="Backup Status"
          value={backups ? (backupOk ? "OK" : "FAIL") : "\u2014"}
          color={backupOk || !backups ? "green" : "amber"}
          sub={backups?.has_errors ? "errors detected" : "all good"}
        />
        <StatCard
          label="Config Drift"
          value={drift ? (driftClean ? "0" : driftStatus) : "\u2014"}
          color={driftClean || !drift ? "emerald" : "amber"}
          sub={drift ? String(drift.last_result ?? "no scan yet") : "loading"}
        />
        <StatCard
          label="Restarts"
          value={restartsData ? restartCount : "\u2014"}
          color={restartCount === 0 || !restartsData ? "violet" : "amber"}
          sub="container restarts"
        />
      </div>

      {/* Middle: Email Organizers */}
      <Card>
        <CardHeader className="pb-3">
          <CardTitle className="text-base font-semibold">Email Organizers</CardTitle>
        </CardHeader>
        <CardContent>
          {!emails ? (
            <p className="text-sm text-muted-foreground">Loading...</p>
          ) : (
            <div className="space-y-4">
              {emails.accounts.map((acct: Record<string, unknown>) => {
                const name = String(acct.account ?? acct.name ?? "?");
                const today = Number(acct.today ?? acct.today_total ?? 0);
                const cats = (acct.categories ?? acct.today_categories ?? {}) as Record<string, number>;
                return (
                  <div key={name} className="flex items-center gap-6 rounded-xl px-4 py-3 bg-white/[0.02] border border-white/[0.04] hover:bg-white/[0.04] transition-colors">
                    <div className="shrink-0 min-w-[140px]">
                      <p className="text-base font-medium text-foreground">{name}</p>
                      <p className="text-xs text-muted-foreground/60 mt-0.5">today</p>
                    </div>
                    <div className="shrink-0">
                      <p className="text-3xl font-bold text-foreground">{today}</p>
                    </div>
                    <div className="flex flex-wrap gap-2 flex-1">
                      {Object.entries(cats).map(([cat, count]) => (
                        <Badge
                          key={cat}
                          variant="secondary"
                          className={`text-xs px-2.5 py-0.5 border ${getCategoryClass(cat)}`}
                        >
                          {cat}: {count}
                        </Badge>
                      ))}
                    </div>
                  </div>
                );
              })}
            </div>
          )}
        </CardContent>
      </Card>

      {/* Bottom: System Health — 2 columns */}
      <div className="grid grid-cols-1 md:grid-cols-2 gap-5">
        {/* Backup Details */}
        <Card>
          <CardHeader className="pb-2 flex flex-row items-center justify-between">
            <CardTitle className="text-base font-semibold">Backup Details</CardTitle>
            {backups && (
              <StatusBadge
                color={backupOk ? "green" : "red"}
                label={String(backups.status ?? "unknown")}
              />
            )}
          </CardHeader>
          <CardContent>
            {!backups ? (
              <p className="text-sm text-muted-foreground">Loading...</p>
            ) : (
              <div className="space-y-3">
                {backups.has_errors ? (
                  <p className="text-sm text-red-400 font-medium">Errors detected in backup</p>
                ) : null}
                <div className="flex items-center justify-between text-sm">
                  <span className="text-muted-foreground/70">Log entries today</span>
                  <span className="text-foreground font-medium">{String(backups.entries ?? 0)}</span>
                </div>
                {backups.last_run ? (
                  <div className="flex items-center justify-between text-sm">
                    <span className="text-muted-foreground/70">Last run</span>
                    <span className="text-foreground">{String(backups.last_run)}</span>
                  </div>
                ) : null}
                {backups.email_count != null ? (
                  <div className="flex items-center justify-between text-sm">
                    <span className="text-muted-foreground/70">Emails backed up</span>
                    <span className="text-foreground font-medium">{String(backups.email_count)}</span>
                  </div>
                ) : null}
              </div>
            )}
          </CardContent>
        </Card>

        {/* Config Drift + Restarts */}
        <Card>
          <CardHeader className="pb-2">
            <CardTitle className="text-base font-semibold">Config Drift & Restarts</CardTitle>
          </CardHeader>
          <CardContent className="space-y-4">
            {/* Drift */}
            <div>
              <div className="flex items-center justify-between mb-2">
                <p className="text-xs uppercase tracking-wider text-muted-foreground/70 font-medium">Config Drift</p>
                {drift && (
                  <StatusBadge
                    color={driftClean ? "green" : "amber"}
                    label={driftStatus}
                  />
                )}
              </div>
              {drift && (
                <p className="text-sm text-muted-foreground">
                  {String(drift.last_result ?? "No scan results yet")}
                </p>
              )}
            </div>

            {/* Restarts */}
            <div>
              <p className="text-xs uppercase tracking-wider text-muted-foreground/70 font-medium mb-2">Recent Restarts</p>
              {restarts.length === 0 ? (
                <p className="text-sm text-muted-foreground/60">No recent restarts</p>
              ) : (
                <div className="space-y-2">
                  {restarts.map((r, i) => (
                    <div key={i} className="flex items-center justify-between text-sm">
                      <span className="text-foreground font-medium">{r.stack}</span>
                      <div className="flex items-center gap-2">
                        <StatusBadge
                          color={r.status === "success" ? "green" : "red"}
                          label={r.status}
                        />
                        <span className="text-xs text-muted-foreground/70">
                          {new Date(r.timestamp).toLocaleTimeString("en-US", {
                            hour: "2-digit",
                            minute: "2-digit",
                          })}
                        </span>
                      </div>
                    </div>
                  ))}
                </div>
              )}
            </div>
          </CardContent>
        </Card>
      </div>
    </div>
  );
}